Display device with touch detection function and electronic apparatus

ABSTRACT

According to an aspect, a display device with a touch detection function includes: a plurality of pixel electrodes arranged in a matrix; a plurality of scanning signal lines; a drive electrode that faces the pixel electrodes; and a plurality of touch detection electrodes including a detection electrode pattern of a transparent conductive body that faces the drive electrode. The detection electrode pattern includes one or more slits each of which is a region where the transparent conductive body is not present. The slits of the detection electrode pattern of the touch detection electrodes extend in a direction different from an extending direction of the scanning signal lines with a slit pitch having a predetermined interval therebetween in the extending direction of the scanning signal lines. The slit pitch is multiples of a natural number of a predetermined pixel pitch in which the pixel electrodes are arranged.

CROSS REFERENCES TO RELATED APPLICATIONS

The present application is a continuation of U.S. patent applicationSer. No. 16/677,107, filed on Nov. 7, 2019, which is a continuation ofU.S. patent application Ser. No. 15/397,361, filed on Jan. 3, 2017, nowU.S. Pat. No. 10,509,506, issued on Dec. 17, 2019, which is acontinuation of U.S. patent application Ser. No. 14/109,038, filed onDec. 17, 2013, which application claims priority to Japanese PriorityPatent Application JP 2012-288905 filed in the Japan Patent Office onDec. 28, 2012, the entire content of which is hereby incorporated byreference.

BACKGROUND 1. Technical Field

The present disclosure relates to a display device and an electronicapparatus that can detect an external proximity object, and moreparticularly relates to a display device with a touch detection functionand an electronic apparatus that can detect an external proximity objectbased on a change in capacitance.

2. Description of the Related Art

In recent years, a touch detection device that can detect an externalproximity object, a so-called “touch panel”, is drawing attention. Thetouch panel is used for the display device with a touch detectionfunction in which a touch detection device is mounted on or integratedwith a display device such as a liquid-crystal display device. Thedisplay device with a touch detection function displays various buttonimages or the like on the display device, and thereby allows informationto be input by the touch panel instead of a general mechanical button.The display device with a touch detection function having such a touchpanel does not require an input device such as a keyboard, a mouse, or akeypad. Accordingly, the usage thereof is increasing in portableinformation devices such as mobile phone as well as computers.

As a method of touch detection, various methods such as an opticalmethod, a resistive method, and a capacitive method can be mentioned. Acapacitive type touch detection device has a relatively simple structureand can realize low power consumption. Accordingly, the capacitive typetouch detection device can be that can be used for a mobile device. Forexample, Japanese Patent Application Laid-open Publication No.2011-138154 describes a touch panel in which a transparent electrodepattern is made invisible. Japanese Patent Application Laid-openPublication No. 2007-264393 relates to a liquid crystal display devicehaving a light-transmissive light condensing sheet, and describes atechnique for suppressing a contrasting pattern (Moire) due tointerference between a prism array pitch of the light condensing sheetand a pixel pitch of a liquid-crystal display panel.

Meanwhile, in the display device with a touch detection function, apixel of a display panel and a touch detection electrode overlap eachother. In the touch detection electrode, a transparent conducting oxidesuch as ITO (Indium Tin Oxide) is used as a material of the transparentelectrode. The touch detection electrode is transparent, but has apredetermined refraction index. Therefore, in the display device with atouch detection function, a slit hole pattern is provided in atransparent electrode pattern of the touch detection electrode, so thatthe touch detection electrode is made invisible and less noticeable onhuman eyes.

There may be a difference in optical wavelengths between light that isemitted from the pixel of the display panel, passes through thetransparent electrode pattern of the touch detection electrode, andreaches a human and light that is emitted from the pixel of the displaypanel, passes through the slit hole pattern, and reaches the human. Thedifference in optical wavelengths appears as a change in color to bedisplayed originally, and stripes (hereinafter, also referred to as“Moire fringes”) of a color shift pattern (color Moire) may becomevisible according to a field angle at which the human watches thedisplay panel.

For the foregoing reasons, there is a need for a display device and anelectronic apparatus that can decrease Moire fringes due to a touchdetection electrode.

SUMMARY

According to an aspect, a display device with a touch detection functionincludes: a substrate; a plurality of pixel electrodes arranged in amatrix on a plane parallel to a surface of the substrate; a plurality ofscanning signal lines extending on a plane parallel to the surface ofthe substrate to supply a scanning signal for driving the pixelelectrodes; a display functional layer that provides an image displayfunction based on an image signal; a drive electrode that faces thepixel electrodes in a vertical direction to the surface of the substrateand extends in a direction parallel to an extending direction of thescanning signal lines; and a plurality of touch detection electrodesincluding a detection electrode pattern of a transparent conductive bodythat faces the drive electrode in the vertical direction and extends ina direction different from the extending direction of the scanningsignal lines. The detection electrode pattern includes one or more slitseach of which is a region where the transparent conductive body is notpresent. The slits of the detection electrode pattern of the touchdetection electrodes extend in a direction different from the extendingdirection of the scanning signal lines with a slit pitch having apredetermined interval therebetween in the extending direction of thescanning signal lines. The slit pitch is multiples of a natural numberof a predetermined pixel pitch in which the pixel electrodes arearranged.

According to another aspect, an electronic apparatus includes thedisplay device with a touch detection function.

Additional features and advantages are described herein, and will beapparent from the following Detailed Description and the figures.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a block diagram illustrating a configuration example of adisplay device with a touch detection function according to a firstembodiment;

FIG. 2 is an explanatory diagram illustrating a state where a finger isnot in contact with or in proximity to the display device, forexplaining a basic principle of a capacitive type touch detectionmethod;

FIG. 3 is an explanatory diagram illustrating an example of anequivalent circuit in the state where a finger is not in contact with orin proximity to the display device as illustrated in FIG. 2 ;

FIG. 4 is an explanatory diagram illustrating a state where a finger isin contact with or in proximity to the display device, for explainingthe basic principle of the capacitive type touch detection method;

FIG. 5 is an explanatory diagram for illustrating an example of anequivalent circuit in the state where a finger is in contact with or inproximity to the display device as illustrated in FIG. 4 ;

FIG. 6 illustrates an example of waveforms of a drive signal and a touchdetection signal;

FIG. 7 illustrates an example of a module having the display device witha touch detection function mounted thereon;

FIG. 8 illustrates an example of a module having the display device witha touch detection function mounted thereon;

FIG. 9 is a sectional view illustrating a schematic sectional structureof a display unit with a touch detection function according to the firstembodiment;

FIG. 10 is a circuit diagram illustrating a pixel arrangement of thedisplay unit with a touch detection function according to the firstembodiment;

FIG. 11 is a perspective view illustrating a configuration example ofdrive electrodes and touch detection electrodes of the display unit witha touch detection function according to the first embodiment;

FIG. 12 is a timing waveform diagram illustrating an operation exampleof the display device with a touch detection function according to thefirst embodiment;

FIG. 13 is a schematic diagram illustrating an arrangement of touchdetection electrodes according to the first embodiment;

FIG. 14 is a schematic diagram illustrating an enlarged view of thetouch detection electrodes according to the first embodiment;

FIG. 15 is another schematic diagram illustrating an enlarged view ofthe touch detection electrodes according to the first embodiment;

FIG. 16 is another schematic diagram illustrating an enlarged view ofthe touch detection electrodes according to the first embodiment;

FIG. 17 is a schematic diagram for explaining a relation between anarrangement of the touch detection electrodes and color regions of acolor filter according to the first embodiment;

FIG. 18 is a schematic diagram for explaining a specific example of therelation between the arrangement of the touch detection electrodes andthe color regions of the color filter illustrated in FIG. 17 ;

FIG. 19 is a schematic diagram for explaining a relation between anarrangement of touch detection electrodes and color regions of a colorfilter according to a second embodiment;

FIG. 20 is a schematic diagram for explaining a specific example of therelation between the arrangement of the touch detection electrodes andthe color regions of the color filter illustrated in FIG. 19 ;

FIG. 21 is a schematic diagram for explaining a first modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 ;

FIG. 22 is a schematic diagram for explaining a second modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 23 is a schematic diagram for explaining a third modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 24 is a schematic diagram for explaining a fourth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 25 is a schematic diagram for explaining a fifth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 26 is a schematic diagram for explaining a sixth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 27 is a schematic diagram for explaining a seventh modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 28 is a schematic diagram for explaining an eighth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter according to illustrated inFIG. 19 ;

FIG. 29 is a schematic diagram illustrating the arrangement of the touchdetection electrodes according to a ninth modification of the secondembodiment;

FIG. 30 is another schematic diagram illustrating the arrangement of thetouch detection electrodes according the ninth modification of to thesecond embodiment;

FIG. 31 is a schematic diagram for explaining a change in luminancecorresponding to an arrangement of touch detection electrodes accordingto a third embodiment;

FIG. 32 is a schematic diagram for explaining a relation between anarrangement of the touch detection electrodes and color regions of acolor filter according to the third embodiment;

FIG. 33 is another schematic diagram for explaining the relation betweenthe arrangement of the touch detection electrodes and the color regionsof the color filter according to the third embodiment;

FIG. 34 is another schematic diagram for explaining the relation betweenthe arrangement of the touch detection electrodes and the color regionsof the color filter according to the third embodiment;

FIG. 35 is another schematic diagram for explaining the relation betweenthe arrangement of the touch detection electrodes and the color regionsof the color filter according to the third embodiment;

FIG. 36 is another schematic diagram for explaining the relation betweenthe arrangement of the touch detection electrodes and the color regionsof the color filter according to the third embodiment;

FIG. 37 illustrates an example of an electronic apparatus to which thedisplay device with a touch detection function according to theembodiment is applied;

FIG. 38 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 39 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 40 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 41 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 42 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 43 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 44 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 45 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 46 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied;

FIG. 47 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied; and

FIG. 48 illustrates another example of an electronic apparatus to whichthe display device with a touch detection function according to theembodiment is applied.

DETAILED DESCRIPTION

Embodiments for carrying out the present disclosure will be explained indetail with reference to the accompanying drawings. The presentdisclosure is not limited to the contents described in the followingembodiments. Constituent elements described in the followingexplanations include those that can be easily conceived by personsskilled in the art and that are substantially identical. In addition,constituent elements described in the following explanations can becombined as appropriate. Explanations are made with the following order.

1. Embodiments (Display Device with Touch Detection Function)

1-1. First embodiment

1-2. Second embodiment

1-3. Third embodiment

1-4. Modifications

2. Application example (Electronic apparatus)

Example in which a display with a touch detection function deviceaccording to the above embodiments is applied to an electronic apparatus

3. Aspects of the present disclosure

1. Embodiments 1-1. First Embodiment

1-1A. Configuration Example

Overall Configuration Example

FIG. 1 is a block diagram illustrating a configuration example of adisplay device with a touch detection function according to a firstembodiment. A display device 1 with a touch detection function includesa display unit 10 with a touch detection function, a control unit 11, agate driver 12, a source driver 13, a drive electrode driver 14, and atouch detection unit 40. The display device 1 with a touch detectionfunction is a display unit in which the display unit 10 with a touchdetection function has a touch detection function incorporated therein.The display unit 10 with a touch detection function is a so-called“in-cell” device in which a liquid-crystal display unit 20 that usesliquid-crystal display elements as display elements and a capacitivetype touch detection device 30 are integrated. The display unit 10 witha touch detection function can be a so-called “on-cell” device that hasthe capacitive type touch detection device 30 mounted on theliquid-crystal display unit 20 that uses the liquid-crystal displayelements as the display elements.

As described later, the liquid-crystal display unit 20 sequentiallyscans horizontal lines one by one to perform display, according to ascanning signal Vscan supplied from the gate driver 12. The control unit11 is a circuit that supplies a control signal, respectively, to thegate driver 12, the source driver 13, the drive electrode driver 14, andthe touch detection unit 40 based on a video signal Vdisp supplied fromoutside to control so that these units operate in synchronization.

The gate driver 12 has a function of sequentially selecting onehorizontal line to be displayed by the display unit 10 with a touchdetection function based on the control signal supplied from the controlunit 11.

The source driver 13 is a circuit that supplies a pixel signal Vpix toeach pixel Pix (each sub-pixel SPix) described later of the display unit10 with a touch detection function based on the control signal suppliedfrom the control unit 11. The source driver 13 generates a pixel signalin which the pixel signals Vpix of a plurality of sub-pixels SPix of theliquid-crystal display unit 20 are time-division multiplexed from thevideo signals for one horizontal line.

The drive electrode driver 14 is a circuit that supplies a drive signalVcom to a drive electrode COML described later of the display unit 10with a touch detection function based on the control signal suppliedfrom the control unit 11.

Basic Principle of Capacitive Type Touch Detection

The touch detection device 30 operates based on a basic principle of thecapacitive type touch detection, and outputs a touch detection signalVdet. The basic principle of touch detection in the display device witha touch detection function according to the embodiment is explained withreference to FIGS. 1 to 6 . FIG. 2 is an explanatory diagramillustrating a state where a finger is not in contact with or inproximity to the display device, for explaining a basic principle of acapacitive type touch detection method. FIG. 3 is an explanatory diagramillustrating an example of an equivalent circuit in the state where afinger is not in contact with or in proximity to the display device asillustrated in FIG. 2 . FIG. 4 is an explanatory diagram illustrating astate where a finger is in contact with or in proximity to the displaydevice, for explaining the basic principle of the capacitive type touchdetection method. FIG. 5 is an explanatory diagram for illustrating anexample of an equivalent circuit in the state where a finger is incontact with or in proximity to the display device as illustrated inFIG. 4 .

For example, as illustrated in FIGS. 2 and 4 , a capacitative element C1includes a pair of electrodes, a drive electrode E1 and a touchdetection electrode E2, that are arranged opposite to each other with adielectric body D interposed therebetween. As illustrated in FIGS. 3 and5 , one end of the capacitative element C1 is coupled to an AC signalsource (drive signal source) S, and the other end P is grounded via aresistance R, and is coupled to a voltage detector (touch detectionunit) DET.

When an AC square wave Sg of a predetermined frequency (for example,about several kHz to several hundreds of kHz) is applied from the ACsignal source S to the drive electrode E1 (one end of the capacitativeelement C1), an output waveform (the touch detection signal Vdet)appears in the touch detection electrode E2 (at the other end P of thecapacitative element C1). The AC square wave Sg corresponds to a touchdetection drive signal Vcomt described later.

As illustrated in FIGS. 2 and 3 , in the state where a finger is not incontact with (or in proximity to) the display device (a non-contactstate), a current Io corresponding to a capacitance value of thecapacitative element C1 flows with charge and discharge to thecapacitative element C1. The shape of potential at the other end P ofthe capacitative element C1 at this time becomes a waveform V₀, forexample, as illustrated in FIG. 6 , and the voltage detector DETillustrated in FIG. 3 detects the waveform V₀.

On the other hand, in the state where a finger is in contact with (or inproximity to) the display device (a contact state), as illustrated inFIG. 4 , a capacitance formed by the finger acts to be added to thecapacitative element C1 as a capacitative element C2. In the equivalentcircuit illustrated in FIG. 5 , the capacitative element C2 is added tothe capacitative element C1 in series. In this state, currents I₁ and I₂flow to the capacitative elements C1 and C2 with charge and discharge tothe capacitative elements C1 and C2. The shape of potential at the otherend P of the capacitative element C1 at this time becomes a waveform V₁,for example, as illustrated in FIG. 6 , and the voltage detector DETdetects the waveform V₁. At this time, the potential at the other end Pbecomes a divided potential determined by the values of the currents I₁and I₂ flowing in the capacitative elements C1 and C2. Therefore, thewaveform V₁ has a smaller value than the waveform V₀ in the non-contactstate. The voltage detector DET compares the detected voltage with apredetermined threshold voltage Vth. When the detected voltage is equalto or larger than the threshold voltage, the voltage detector DETdetermines that the state is the non-contact state, and when thedetected value is smaller than the threshold voltage Vth, the voltagedetector DET determines that the state is the contact state. Touchdetection can be performed in this manner.

The touch detection device 30 illustrated in FIG. 1 performs touchdetection by sequentially scanning a detection block one by oneaccording to the drive signal Vcom (the touch detection drive signalVcomt described later) supplied from the drive electrode driver 14.

The touch detection device 30 outputs the touch detection signal Vdetfor each detection block from a plurality of touch detection electrodesTDL described later, and supplies the touch detection signal Vdet to thetouch detection unit 40.

The touch detection unit 40 is a circuit that detects the presence oftouch (the contact state described above) to the touch detection device30 based on the control signal supplied from the control unit 11 and thetouch detection signal Vdet supplied from the touch detection device 30of the display unit 10 with a touch detection function, and obtains acoordinate thereof in a touch detection area when the presence of touchis detected. The touch detection unit 40 includes an analog LPF (LowPass Filter) 42, an A/D convertor 43, a signal processor 44, acoordinate extractor 45, and a detection-timing controller 46.

The analog LPF 42 is a low-pass analog filter that receives the touchdetection signal Vdet supplied from the touch detection device 30 as aninput, removes a high frequency component (a noise component) includedin the touch detection signal Vdet to extract a touch component, andoutput the touch component. The resistance R for applying a DC potential(0 V) is coupled between respective input terminals of the analog LPF 42and the ground. For example, a switch can be provided instead of theresistance R to apply the DC potential (0 V) by turning on the switch ata predetermined time.

The A/D convertor 43 is a circuit that samples an analog signal outputfrom the analog LPF 42 at a timing synchronized with the drive signalVcom and converts the sampled analog signal to a digital signal.

The signal processor 44 includes a digital filter that removes thefrequency component (the noise component) that is included in an outputsignal of the A/D convertor 43 and is higher than a frequency at whichthe touch detection signal Vdet has been sampled, and extracts the touchcomponent. The signal processor 44 is a logical circuit that detects thepresence of touch to the touch detection device 30 based on the outputsignal of the A/D convertor 43.

The coordinate extractor 45 is a logical circuit that obtains touchpanel coordinates when a touch is detected by the signal processor 44.The detection-timing controller 46 performs control so that the A/Dconvertor 43, the signal processor 44, and the coordinate extractor 45operate in synchronization.

Module

FIGS. 7 and 8 illustrate an example of a module having the displaydevice with a touch detection function mounted thereon. As illustratedin FIG. 7 , the display device 1 with a touch detection function canform the drive electrode driver 14 described above on a glass TFTsubstrate 21 when the display device 1 with a touch detection functionis mounted on a module.

As illustrated in FIG. 7 , the display device 1 with a touch detectionfunction includes the display unit 10 with a touch detection function,the drive electrode driver 14, and a COG (Chip On Glass) 19A. Thedisplay unit 10 with a touch detection function is a so-called“landscape” type (horizontally long). In the display unit 10 with atouch detection function, the drive electrodes COML and the touchdetection electrodes TDL formed to intersect the drive electrodes COMLin grade separation are schematically illustrated in a verticaldirection to a surface of the TFT substrate described later. That is,the drive electrodes COML are formed along a short-side direction of thedisplay unit 10 with a touch detection function, and the touch detectionelectrodes TDL are formed along a long-side direction of the displayunit 10 with a touch detection function. An output of each touchdetection electrode TDL is provided on the short side of the displayunit 10 with a touch detection function, and is coupled to the touchdetection unit 40 mounted on outside of the module via a terminalportion T configured by a flexible substrate or the like. The driveelectrode driver 14 is formed on the TFT substrate 21, which is a glasssubstrate. The COG 19A is a chip mounted on the TFT substrate 21, andhas incorporated therein respective circuits required for a displayoperation such as the control unit 11, the gate driver 12, and thesource driver 13 illustrated in FIG. 1 . As illustrated in FIG. 8 , thedisplay device 1 with a touch detection function can have the driveelectrode driver 14 incorporated in a COG (Chip On Glass) 19B.

In the configuration illustrated in FIG. 8 , the display device 1 with atouch detection function includes the COG 19B. The COG 19B illustratedin FIG. 8 further has incorporated therein the drive electrode driver 14in addition to the respective circuits required for the displayoperation described above.

In this manner, the display device 1 with a touch detection functionillustrated in FIGS. 7 and 8 outputs the touch detection signal Vdetfrom the short side of the display unit 10 with a touch detectionfunction. Therefore, the display device 1 with a touch detectionfunction can reduce the number of touch detection electrodes TDL,thereby facilitating a wiring arrangement at the time of coupling to thetouch detection unit 40 via the terminal portion T. Because the displaydevice 1 with a touch detection function illustrated in FIG. 8incorporates the drive electrode driver 14 in the COG 19B, a framethereof can be made narrow.

Display Unit 10 with Touch Detection Function

A configuration example of the display unit 10 with a touch detectionfunction is explained next in detail.

FIG. 9 is a sectional view illustrating a schematic sectional structureof the display unit with a touch detection function according to thefirst embodiment. FIG. 10 is a circuit diagram illustrating a pixelarrangement of the display unit with a touch detection functionaccording to the first embodiment. The display unit 10 with a touchdetection function includes a pixel substrate 2, a counter substrate 3arranged opposite to the surface of the pixel substrate 2 in a verticaldirection thereto, and a liquid crystal layer 6 interposed between thepixel substrate 2 and the counter substrate 3.

The pixel substrate 2 includes the TFT substrate 21 as a circuitsubstrate, a plurality of pixel electrodes 22 arranged in a matrix onthe TFT substrate 21, a plurality of drive electrodes COML formedbetween the TFT substrate 21 and the pixel electrodes 22, and aninsulation layer 24 that insulates between the pixel electrodes 22 andthe drive electrodes COML. As illustrated in FIG. 10 , the TFT substrate21 includes a thin film transistor (TFT) element Tr provided for eachsub-pixel SPix and wiring such as a pixel signal line SGL for supplyingthe pixel signal Vpix to pixel electrodes 22, and a scanning signal lineGCL that drive TFT elements Tr. In this manner, the pixel signal lineSGL extends on a plane parallel to the surface of the TFT substrate 21to supply an image signal for displaying an image on a pixel. Theliquid-crystal display unit 20 illustrated in FIG. 10 has the sub-pixelsSPix arranged in a matrix. Each sub-pixel SPix includes the TFT elementTr and a liquid crystal element LC. The TFT element Tr is constituted bya thin film transistor, and constituted by an n-channel MOS (Metal OxideSemiconductor) TFT in this example. A source of the TFT element iscoupled to the pixel signal line SGL, a gate thereof is coupled to thescanning signal line GCL, and a drain thereof is coupled to one end ofthe liquid crystal element LC. One end of the liquid crystal element LCis coupled to the drain of the TFT element Tr, and the other end iscoupled to the drive electrode COML.

The sub-pixel SPix is coupled to other sub-pixels SPix belonging to thesame row of the liquid-crystal display unit 20 by the scanning signalline GCL. The scanning signal line GCL is coupled to the gate driver 12,and supplied with the scanning signal Vscan from the gate driver 12. Thesub-pixel SPix is also coupled to other sub-pixels SPix belonging to thesame column of the liquid-crystal display unit 20 by the pixel signalline SGL. The pixel signal line SGL is coupled to the source driver 13,and supplies with the pixel signal Vpix from the source driver 13.Furthermore, the sub-pixel SPix is coupled to other sub-pixels SPixbelonging to the same row of the liquid-crystal display unit 20 by thedrive electrode COML. The drive electrode COML is coupled to the driveelectrode driver 14, and supplied with the drive signal Vcom from thedrive electrode driver 14. That is, in this example, the sub-pixels SPixbelonging to the same row share one drive electrode COML.

By applying the scanning signal Vscan to the gate of the TFT elements Trof the sub-pixel SPix via the scanning signal line GCL illustrated inFIG. 10 , the gate driver 12 illustrated in FIG. 1 sequentially selectsone row (one horizontal line) of the sub-pixels SPix formed in thematrix on the liquid-crystal display unit 20 as a display target. Thesource driver 13 illustrated in FIG. 1 supplies the pixel signal Vpix tothe respective sub-pixels SPix constituting one horizontal line to beselected sequentially by the gate driver 12 via the pixel signal lineSGL illustrated in FIG. 10 . In the sub-pixels SPix, one horizontal lineis displayed according to the supplied pixel signal Vpix. The driveelectrode driver 14 illustrated in FIG. 1 drives the drive electrodesCOML in a unit of a block each including a predetermined number of driveelectrodes COML illustrated in FIGS. 9 and 10 by applying the drivesignal Vcom thereto.

As described above, in the liquid-crystal display unit 20, the gatedriver 12 drives the scanning signal line GCL so as to perform linesequential scanning in a time divisional manner, and one horizontal lineis sequentially selected. Further, in the liquid-crystal display unit20, the source driver 13 supplies the pixel signals Vpix to the pixelsPix belonging to one horizontal line, thereby performing display foreach horizontal line. At the time of performing the display operation,the drive electrode driver 14 applies the drive signal Vcom to the blockincluding the drive electrode COML corresponding to the one horizontalline.

The counter substrate 3 includes a glass substrate 31, and a colorfilter 32 formed on a surface of the glass substrate 31. The touchdetection electrode TDL, which is a detection electrode of the touchdetection device 30, is formed on the other surface of the glasssubstrate 31, and a polarization plate 35 is arranged on the touchdetection electrode TDL.

The color filter 32 includes color regions 32R, 32G, and 32B colored inthree colors of red (R), green (G), and blue (B). The color filter 32faces the pixel electrodes 22 in the vertical direction to the TFTsubstrate 21, and overlaps with them as viewed in the vertical directionto the surface of the TFT substrate 21. The color filter 32 is matchedwith the pixel Pix as one set, in which the color regions 32R, 32G, and32B colored in three colors of red (R), green (G), and blue (B) arematched with each sub-pixel SPix illustrated in FIG. 10 by cyclicallyarranging color filters colored in, for example, three colors of red(R), green (G), and blue (B). The color filter 32 faces the liquidcrystal layer 6 in the vertical direction to the TFT substrate 21. Thecolor filter 32 can use a combination of other colors, when the filtersare colored in different colors.

The drive electrode COML according to the present embodiment functionsas a common electrode (common drive electrode) of the liquid-crystaldisplay unit 20, and also functions as a drive electrode of the touchdetection device 30. In the embodiment, one drive electrode COML isarranged so as to correspond to one pixel electrode 22 (a pixelelectrode 22 constituting one row). The insulation layer 24 insulatesbetween the pixel electrode 22 and the drive electrode COML, andinsulates between the pixel electrode 22 and the pixel signal line SGLformed on the surface of the TFT substrate 21. The drive electrode COMLfaces the pixel electrode 22 in the vertical direction to the surface ofthe TFT substrate 21, and extends in a direction parallel to theextending direction of the scanning signal line CGL.

The liquid crystal layer 6 modulates light passing therethroughaccording to the state of electric fields, and a liquid-crystal displayunit using a liquid crystal of horizontal electric-field mode, such asFFS (fringe field switching) mode and IPS (in-plane switching) mode, canbe used. An orientation film can be arranged, respectively, between theliquid crystal layer 6 and the pixel substrate 2, and the liquid crystallayer 6 and the counter substrate 3 illustrated in FIG. 9 .

The orientation film can be respectively arranged between the liquidcrystal layer 6 and the pixel substrate 2, and the liquid crystal layer6 and the counter substrate 3, and an incident-side polarization platecan be arranged on the lower surface side of the pixel substrate 2.

FIG. 11 is a perspective view illustrating a configuration example ofthe drive electrodes and the touch detection electrodes of the displayunit with a touch detection function according to the first embodiment.The touch detection device 30 includes the drive electrodes COML and thetouch detection electrodes TDL. The drive electrodes COML are providedas a plurality of stripe electrode patterns extending in a horizontaldirection in FIG. 11 . When the touch detection operation is performed,the drive signal Vcom is sequentially supplied to the respectiveelectrode patterns by the drive electrode driver 14, so as to performline sequential scanning in the time divisional manner as describedbelow. The touch detection electrodes TDL are provided as the stripeelectrode patterns extending in a direction orthogonal to an extendingdirection of the electrode patterns of the drive electrodes COML. Thetouch detection electrodes TDL face the drive electrodes COML in thevertical direction to the surface of the TFT substrate 21. Therespective electrode patterns of the touch detection electrodes TDL arerespectively coupled to an input of the analog LPF 42 of the touchdetection unit 40. The electrode patterns in which the drive electrodesCOML and the touch detection electrodes TDL intersect each othergenerate a capacitance at intersections thereof.

According to the configuration, in the touch detection device 30, at thetime of performing the touch detection operation, the drive electrodedriver 14 sequentially selects one detection block of the driveelectrodes COML by performing the drive to line-sequentially scan thedrive electrodes COML as the drive electrode block in the timedivisional manner, and touch detection of one detection block isperformed by outputting the touch detection signals Vdet from the touchdetection electrodes TDL. That is, the drive electrode block correspondsto the drive electrode E1 in the basic principle of touch detectiondescribed above, and the touch detection electrode TDL corresponds tothe touch detection electrode E2. The touch detection device 30 detectstouch according to the basic principle. As illustrated in FIG. 11 , theelectrode patterns that intersect each other constitutes capacitive typetouch sensors in a matrix. Accordingly, when the entire touch detectionsurface of the touch detection device 30 is scanned, a position wherecontact or proximity of an external proximity object has occurredtherein can be detected.

The TFT substrate 21 corresponds to a specific example of “substrate”according to the present disclosure. The pixel electrode 22 correspondsto a specific example of “pixel electrode” according to the presentdisclosure. The scanning signal line GCL corresponds to a specificexample of “scanning signal line” according to the present disclosure.The drive electrode COML corresponds to a specific example of “driveelectrode” according to the present disclosure. The touch detectionelectrode TDL corresponds to a specific example of “touch detectionelectrode” according to the present disclosure. The liquid crystalelement LC corresponds to a specific example of “display functionallayer” according to the present disclosure. The source driver 13 and thedrive electrode driver 14 correspond to a specific example of “scanningdrive unit” according to the present disclosure. The touch detectionunit 40 corresponds to a specific example of “detection processing unit”according to the present disclosure. The touch detection electrode TDLcorresponds to “touch detection electrode” according to the presentdisclosure. The color filter 32 corresponds to “color filter” accordingto the present disclosure.

1-1B. Operations and Functions

Subsequently, operations and functions of the display device 1 with atouch detection function according to the first embodiment are explainedbelow.

Because the drive electrode COML functions as the common drive electrodeof the liquid-crystal display unit 20, and also functions as the driveelectrode of the touch detection device 30, the drive signal Vcom maycause influence on each other. Therefore, the drive signal Vcom isapplied to the drive electrode COML separately in a display period B forperforming a display operation and a touch detection period A forperforming a touch detection operation. The drive electrode driver 14applies the drive signal Vcom as a display drive signal in the displayperiod B for performing the display operation. The drive electrodedriver 14 applies the drive signal Vcom as the touch detection drivesignal in the touch detection period A for performing the touchdetection operation. In the following explanations, the drive signalVcom as the display drive signal may be described as a display drivesignal Vcomd, and the drive signal Vcom as the touch detection drivesignal may be described as a touch detection drive signal Vcomt.

Outline of Entire Operation

The control unit 11 supplies a control signal respectively to the gatedriver 12, the source driver 13, the drive electrode driver 14, and thetouch detection unit 40 based on the video signal Vdisp supplied fromoutside, and controls these units to operate in synchronization witheach other. The gate driver 12 supplies the scanning signal Vscan to theliquid-crystal display unit 20 in the display period B, and sequentiallyselects one horizontal line as a display target. The source driver 13supplies the pixel signals Vpix to the respective pixels Pix thatconstitute one horizontal line selected by the gate driver 12 in thedisplay period B.

The drive electrode driver 14 applies the display drive signal Vcomd tothe drive electrode block corresponding to one horizontal line in thedisplay period B, and sequentially applies the touch detection drivesignal Vcomt of a frequency higher than that of the display drive signalVcomd to the drive electrode block corresponding to a touch detectionoperation to select one detection block sequentially in the touchdetection period A. In the display period B, the display unit 10 with atouch detection function performs the display operation based on signalssupplied from the gate driver 12, the source driver 13, and the driveelectrode driver 14. In the touch detection period A, the display unit10 with a touch detection function performs the touch detectionoperation based on the signal supplied from the drive electrode driver14, and outputs the touch detection signal Vdet from the touch detectionelectrode TDL. The analog LPF 42 amplifies and outputs the touchdetection signal Vdet. The A/D convertor 43 converts an analog signaloutput from the analog LPF 42 to a digital signal at a timingsynchronized with the touch detection drive signal Vcomt. The signalprocessor 44 detects the presence of touch to the touch detection device30 based on an output signal from the A/D convertor 43. When a touch isdetected by the signal processor 44, the coordinate extractor 45 obtainsa touch panel coordinate thereof, and outputs an output signal Vout. Thecontrol unit 11 controls the detection-timing controller 46 to change asampling frequency of the touch detection drive signal Vcomt.

Detailed Operation

A detailed operation of the display device 1 with a touch detectionfunction is explained next. FIG. 12 is a timing waveform diagramillustrating an operation example of the display device with a touchdetection function according to the first embodiment. As illustrated inFIG. 12 , the liquid-crystal display unit 20 sequentially scans thehorizontal lines one by one on the adjacent (n−1)-th row, the n-th row,and the (n+1)-th row of the scanning signal lines GCL to perform displayaccording to the scanning signal Vscan supplied from the gate driver 12.Similarly, the drive electrode driver 14 supplies the drive signal tothe adjacent (m−1)-th row, the m-th row, and the (m+1)-th row of thedrive electrodes COML of the display unit 10 with a touch detectionfunction based on the control signal supplied from the control unit 11.

In this manner, the display device 1 with a touch detection functionperforms a touch detection operation (the touch detection period A) anda display operation (the display period B) in the time divisional mannerfor each display horizontal period 1H. In the touch detection operation,the display device 1 with a touch detection function selects a differentdrive electrode COML for each display horizontal period 1H and appliesthe drive signal Vcom thereto, thereby to perform scanning of touchdetection. The operation thereof is explained below in detail.

First, the gate driver 12 applies the scanning signal Vscan to thescanning signal line GCL on the (n−1)-th row, and the scanning signalVscan(n−1) changes from a low level to a high level. Accordingly, onedisplay horizontal period 1H starts.

Next, in the touch detection period A, the drive electrode driver 14applies the drive signal Vcom to the drive electrode COML on the(m−1)-th row, and the drive signal Vcom(m−1) changes from a low level toa high level. The drive signal Vcom(m−1) is transmitted to the touchdetection electrode TDL via the capacitance, and the touch detectionsignal Vdet changes. When the drive signal Vcom(m−1) changes from thehigh level to the low level, the touch detection signal Vdet alsochanges. The waveform of the touch detection signal Vdet in the touchdetection period A corresponds to that of the touch detection signalVdet in the basic principle of touch detection as described above. TheA/D convertor 43 performs A/D conversion on the touch detection signalVdet in the touch detection period A, and the signal processor 44performs touch detection. Thus, the display device 1 with a touchdetection function performs touch detection of one detection line.

Next, in the display period B, the source driver 13 applies the pixelsignal Vpix to the pixel signal line SGL to perform display of onehorizontal line. As illustrated in FIG. 12 , a change in the pixelsignal Vpix is transmitted to the touch detection electrode TDL via aparasitic capacitance, and the touch detection signal Vdet can change.However, the A/D convertor 43 does not perform A/D conversion in thedisplay period B, thereby enabling to suppress the influence of thechange in the pixel signal Vpix with respect to touch detection. Afterthe supply of the pixel signal Vpix by the source driver 13 is complete,the gate driver 12 changes the scanning signal Vscan of the scanningsignal line GCL on the (n−1)-th row from the high level to the lowlevel, and the one display horizontal period 1H finishes.

Next, the gate driver 12 applies the scanning signal Vscan to thescanning signal line GCL on the n-th row different from the previousrow, and the scanning signal Vscan(n) changes from the low level to thehigh level. Accordingly, the next display horizontal period 1H starts.

In the next touch detection period A, the drive electrode driver 14applies the drive signal Vcom to the drive electrode COML on the m-throw different from the previous column. The A/D convertor 43 performsA/D conversion on the change in the touch detection signal Vdet, andthus the touch detection of one detection line is performed.

Next, in the display period B, the source driver 13 applies the pixelsignal Vpix to the pixel signal line SGL to perform display of onehorizontal line. Because the display device 1 with a touch detectionfunction according to the present embodiment performs inversion drive,the polarity of the pixel signal Vpix applied by the source driver 13 isinverted as compared with that of the previous display horizontal period1H. After the display period B has finished, the one display horizontalperiod 1H finishes.

Thereafter, by repeating the operation described above, the displaydevice 1 with a touch detection function performs the display operationby performing scanning over the entire display surface, and performs thetouch detection operation by performing scanning over the entire touchdetection surface.

As described above, the display device 1 with a touch detection functionperforms the touch detection operation in the touch detection period A,and the display operation in the display period B in one displayhorizontal period 1H. In this manner, because the touch detectionoperation and the display operation are performed in different periods,both the display operation and the touch detection operation can beperformed in the same one display horizontal period 1H, and theinfluence of the display operation with respect to touch detection canbe suppressed.

Arrangement of Touch Detection Electrodes

FIG. 13 is a schematic diagram illustrating an arrangement of touchdetection electrodes according to the first embodiment. The touchdetection electrodes TDL illustrated in FIG. 13 extend in a directiondifferent from an extending direction of the scanning signal line GCLillustrated in FIG. 10 . The touch detection electrodes TDL are arrangedwith a predetermined pitch. In the touch detection electrode TDL, atransparent conducting oxide such as ITO (Indium Tin Oxide) is used as amaterial of the transparent electrode. The touch detection electrode TDLis transparent, but has a predetermined refraction index. Therefore, inthe display device 1 with a touch detection function, a dummy electrodeTDD is provided between transparent electrode patterns of the touchdetection electrodes TDL, so that the touch detection electrodes aremade invisible and less noticeable on human eyes.

Therefore, as illustrated in FIG. 13 , in the counter substrate 3, thedummy electrode TDD, which is not coupled to the touch detection unit40, is arranged between the touch detection electrodes TDL and parallelto the extending direction of the touch detection electrodes TDL. Thedummy electrode TDD is formed of the same material as that of the touchdetection electrode TDL. Therefore, visibility of the touch detectionelectrodes TDL is mitigated.

FIGS. 14, 15, and 16 are schematic diagrams illustrating an enlargedview of the touch detection electrodes according to the firstembodiment. FIG. 14 is a specific enlarged view illustrating the touchdetection electrode TDL and the dummy electrode TDD illustrated in FIG.13 . FIG. 15 is an enlarged view illustrating the touch detectionelectrode TDL illustrated in FIG. 14 . FIG. 16 is an enlarged viewillustrating a slit at a position U in the transparent electrode patternof the touch detection electrode TDL illustrated in FIG. 15 .

As illustrated in FIGS. 14, 15, and 16 , the touch detection electrodeTDL includes detection electrode patterns 61, and a detection-electrodesconductive portions 62 that conduct between the detection electrodepatterns 61. The detection electrode patterns 61 and thedetection-electrodes conductive portions 62 forms a pattern of atransparent conductive body e such as ITO that surrounds the peripheryof a non-detection area 65.

The detection electrode patterns 61 are transparent, but have apredetermined refraction index. Therefore, in the display device 1 witha touch detection function, one or more slits SL in which there is notransparent conductive body e such as ITO is provided in each detectionelectrode pattern 61 of the touch detection electrode TDL, so that thetouch detection electrodes TDL are made invisible and less noticeable onhuman eyes.

Similarly, dummy pattern dmp is arranged in the non-detection area 65surrounded by the detection electrode patterns 61 illustrated in FIG. 15by using the transparent conductive body e such as ITO as illustrated inFIG. 14 , so that the touch detection electrodes TDL are made invisibleand less noticeable on human eyes. The dummy pattern dmp is partitionedinto reed-shaped dummy patterns 64 by one or more slits SL.

The dummy electrode TDD illustrated in FIG. 14 is partitioned intoreed-shaped dummy patterns 63 of the transparent conductive body e suchas ITO by the slits SL described above. The slit SL described above alsopartitions the dummy electrode TDD and the touch detection electrodeTDL. The slit SL between the dummy electrode TDD and the touch detectionelectrode TDL and the slit SL in the detection electrode patterns 61,the dummy pattern dmp, and the dummy electrode TDD are arranged with anequal interval.

FIG. 17 is a schematic diagram for explaining a relation between anarrangement of the touch detection electrodes and color regions of thecolor filter according to the first embodiment. FIG. 18 is a schematicdiagram for explaining a specific example of the relation between thearrangement of the touch detection electrodes and the color regions ofthe color filter illustrated in FIG. 17 . As illustrated in FIGS. 17 and18 , the color filter 32 includes color regions 32R, 32G, and 32Bcolored in three colors of red (R), green (G), and blue (B). Normally,the color regions 32R, 32G, and 32B respectively extend in a directionto intersect the extending direction of the scanning signal line GCL ingrade separation and orthogonal thereto. Furthermore, the detectionelectrode patterns 61 of the touch detection electrodes TDL illustratedin FIG. 17 extend in the direction to intersect the extending directionof the scanning signal line GCL in grade separation and orthogonalthereto. The slit SL is a straight line, as illustrated in FIG. 18 ,extending in the direction orthogonal to the scanning signal line GCL.

As described above, the color filter 32 is matched with the pixel Pix asone set, in which the color regions 32R, 32G, and 32B colored in threecolors of red (R), green (G), and blue (B) are matched with eachsub-pixel SPix. When it is assumed that a pitch of the pixel Pix (apitch of one set of the sub-pixels SPix) in the extending direction ofthe scanning signal line GCL is a pixel pitch GL, and a pitch of theslit SL in the extending direction of the scanning signal line GCL is aslit pitch LX, the slit pitch LX is multiples of a natural number of thepixel pitch GL.

In this manner, the slits SL in the detection electrode patterns 61 ofthe touch detection electrodes TDL are arranged with an interval ofmultiples of a natural number (for example, one time) of the pitch ofthe pixel Pix of the pixel electrodes 22 arranged in the matrix.Further, the slits SL in the dummy patterns 63 and 64 are also arrangedwith the interval of multiples of a natural number (for example, onetime) of the pitch of the pixel Pix of the pixel electrodes 22 arrangedin the matrix.

Operational Effect

There may be a difference in optical wavelengths according to thepresence or nonpresence of the transparent conductive body e, betweenlight that is emitted from the pixel Pix of the liquid-crystal displayunit 20, passes through the detection electrode pattern 61 of the touchdetection electrode TDL or the dummy pattern 63 or 64, and reaches humanand light that is emitted from the pixel Pix of the liquid-crystaldisplay unit 20, passes through the slit SL, and reaches human. Thedifference in the optical wavelengths appears as a change in color to bedisplayed originally, and Moire fringes may become visible according toa field angle at which the human watches the display unit 10 with atouch detection function.

As described above, the slits SL according to the first embodiment arearranged with the interval of multiples of a natural number (forexample, one time) of the pitch of the pixel Pix of the pixel electrodes22 arranged in the matrix. Therefore, the slit SL according to the firstembodiment overlaps regions of a specific color as viewed in thevertical direction to the surface of the TFT substrate 21. For example,as illustrated in FIG. 17 , the slit SL overlaps the specific colorregions 32B as viewed in the vertical direction to the surface of theTFT substrate 21. Alternatively, as illustrated in FIG. 18 , the slit SLoverlaps the specific color regions 32G as viewed in the verticaldirection to the surface of the TFT substrate 21. Therefore, in thedisplay device 1 with a touch detection function according to the firstembodiment, the slit SL does not cause a variation of a decrease oftransmittance between pixels Pix.

Furthermore, the display device 1 with a touch detection functionaccording to the first embodiment can reduce the influence of the slitsSL as compared with a case where the slit SL is provided for eachsub-pixel SPix. As a result, in the display device 1 with a touchdetection function according to the first embodiment, the possibility ofcausing a difference in the optical wavelengths due to the presence ornonpresence of the transparent conductive body e can be suppressed.Therefore, the display device 1 with a touch detection functionaccording to the first embodiment can suppress the possibility ofshifting the color to be displayed originally by the liquid-crystaldisplay unit 20. As a result, the display unit 10 with a touch detectionfunction according to the first embodiment can decrease the possibilityin which Moire fringes become visible according to the visual fieldangle.

1-2. Second Embodiment

The display device 1 with a touch detection function according to asecond embodiment is explained next. FIG. 19 is a schematic diagram forexplaining a relation between an arrangement of touch detectionelectrodes and color regions of a color filter according to the secondembodiment. FIG. 20 is a schematic diagram for explaining a specificexample of the relation between the arrangement of the touch detectionelectrodes and the color regions of the color filter illustrated in FIG.19 . Same reference signs refer to similar constituent elementsexplained in the first embodiment, and redundant explanations thereofmay not be repeated.

As illustrated in FIGS. 19 and 20 , the color filter 32 includes colorregions 32R, 32G, and 32B colored in three colors of red (R), green (G),and blue (B). Normally, the color regions 32R, 32G, and 32B respectivelyextend in the direction to intersect the extending direction of thescanning signal line GCL in grade separation and orthogonal thereto.Furthermore, the detection electrode patterns 61 of the touch detectionelectrodes TDL illustrated in FIG. 19 extend in the direction tointersect the extending direction of the scanning signal line GCL ingrade separation and orthogonal thereto. The slit SL is a zigzag line,as illustrated in FIG. 19 , in which a straight line having an angle θwith respect to a straight line orthogonal to the scanning signal lineGCL is folded back at a bent part at a regular interval.

As described above, the color filter 32 is matched with the pixel Pix asone set, in which the color regions 32R, 32G, and 32B colored in threecolors of red (R), green (G), and blue (B) are matched with eachsub-pixel SPix. When it is assumed that the pitch of the pixel Pix (thepitch of one set of the sub-pixels SPix) in the extending direction ofthe scanning signal line GCL is the pixel pitch GL, and the pitch of theslit SL in the extending direction of the scanning signal line GCL isthe slit pitch LX, the slit pitch LX is multiples of a natural number ofthe pixel pitch GL.

For example, in FIG. 19 , the slit pitch LX is two times the pixel pitchGL. In FIG. 20 , the slit pitch LX is one time the pixel pitch GL. Asillustrated in FIG. 19 , when it is assumed that a slit folding pitch ofthe slit SL that is folded back at a bent part is DL, the slit foldingpitch DL is three times the pitch of the sub-pixel SPix in the extendingdirection of the scanning signal line GCL. The slit SL is folded backacross four sub-pixels Spix.

As described above, the slits SL in the detection electrode patterns 61of the touch detection electrodes TDL are arranged with an interval ofmultiples of a natural number (for example, two times) of the pitch ofthe pixel Pix of the pixel electrodes 22 arranged in a matrix.Similarly, the slits SL in the dummy patterns 63 and 64 are arrangedwith the interval of multiples of a natural number (for example, twotimes) of the pitch of the pixel Pix of the pixel electrodes 22 arrangedin the matrix.

1-2A. Operational Effect

As in the slits SL according to the first embodiment, the slits SLaccording to the second embodiment are arranged with the interval ofmultiples of a natural number (for example, two times) of the pitch ofthe pixel Pix of the pixel electrodes 22 arranged in the matrix. It ispossible to reduce the influence of the slits SL by increasing the slitpitch LX, as compared with a case where the slit SL is provided for eachsub-pixel SPix. However, when the slit pitch LX is equal to or largerthan 150 micrometers (μm), an invisibilizing effect deteriorates, and,for example, the touch detection electrodes TDL may be viewed.Therefore, the slit SL of the second embodiment is a zigzag line. Theslit SL of the second embodiment overlaps a plurality of color regionsso as to extend across the color regions as viewed in the verticaldirection to the surface of the TFT substrate 21.

For example, as illustrated in FIG. 19 , the slit SL overlaps thespecific color regions 32B, 32R, and 32G as viewed in the verticaldirection to the surface of the TFT substrate 21. Alternatively, asillustrated in FIG. 20 , the slit SL overlaps the specific color regions32B and 32G as viewed in the vertical direction to the surface of theTFT substrate 21. Therefore, in the display device 1 with a touchdetection function according to the second embodiment, the slit SL doesnot cause a variation of a decrease of transmittance between pixels Pix.Accordingly, the slit SL according to the second embodiment canstrengthen the invisibilizing effect, and even if the slit pitch LX isincreased, visibility of the detection electrode patterns 61 and thedummy patterns 63 and 64 can be reduced.

Furthermore, the display device 1 with a touch detection functionaccording to the second embodiment can reduce the influence of the slitsSL as compared with the case where the slit SL is provided for eachsub-pixel SPix. As a result, the display device 1 with a touch detectionfunction according to the second embodiment can suppress the possibilityof causing a difference in the optical wavelengths according to thepresence or nonpresence of the transparent conductive body e. Therefore,the display device 1 with a touch detection function according to thesecond embodiment can suppress the possibility of shifting the color tobe displayed originally by the liquid-crystal display unit 20. As aresult, the display unit 10 with a touch detection function according tothe second embodiment can decrease the possibility in which Moirefringes become visible according to the visual field angle.

1-2B. First Modification of Second Embodiment

FIG. 21 is a schematic diagram for explaining a first modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 . Asillustrated in FIG. 21 , the slit SL according to the first modificationof the second embodiment is a wavy line in which a straight line havingan angle θ with respect to a straight line orthogonal to the scanningsignal line GCL is folded back at a bent part SLQ at a regular interval.As compared with the zigzag line described above, the wavy line is acurved line with a corner of a bent part SLQ being rounded, therebyenabling to suppress an increase of resistance due to the influence ofthe bent part SLQ. The example explained in the second embodiment withthe zigzag line of the slit SL can apply the wavy line as well.

1-2C. Second Modification of Second Embodiment

FIG. 22 is a schematic diagram for explaining a second modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 . Asillustrated in FIG. 22 , a slit pitch LX according to the secondmodification of the second embodiment is multiples of a natural number(for example, one time) of the pixel pitch GL. The slit SL according tothe second modification of the second embodiment is a zigzag line. Theslit SL according to the second modification of the second embodimentdoes not overlap a plurality of color regions to extend across theplurality of color regions as viewed in the vertical direction to thesurface of the TFT substrate 21.

The slit folding pitch DL is equal to or smaller than a pitch SPL of thesub-pixel SPix in the extending direction of the scanning signal lineGCL. The slit SL is folded back in the column of one sub-pixel SPix. Theslit SL overlaps the regions of a specific color such as the colorregions 32B as viewed in the vertical direction to the surface of theTFT substrate 21. For example, as illustrated in FIG. 22 , the slit SLoverlaps the specific color regions 32G as viewed in the verticaldirection to the surface of the TFT substrate 21. Therefore, in thedisplay device 1 with a touch detection function according to the secondmodification of the second embodiment, the slit SL does not cause avariation of a decrease of transmittance between pixels Pix.Furthermore, it is expected that the slit SL can strengthen theinvisibilizing effect due to the effect of its zigzag line shape.

1-2D. Third Modification of Second Embodiment

FIG. 23 is a schematic diagram for explaining a third modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 . Asillustrated in FIG. 23 , the slit pitch LX according to the thirdmodification of the second embodiment is multiples of a natural number(for example, one time) of the pixel pitch GL. The slit SL according tothe third modification of the second embodiment is a zigzag line. Theslit SL according to the third modification of the second embodimentoverlaps a plurality of color regions so as to extend across theplurality of color regions as viewed in the vertical direction to thesurface of the TFT substrate 21.

The slit folding pitch DL is equal to or smaller than two times of thepitch SPL of the sub-pixel SPix in the extending direction of thescanning signal line GCL. The slit SL is folded back across twosub-pixels SPix.

For example, as illustrated in FIG. 23 , the slit SL overlaps aplurality of color regions 32G and 32B as viewed in the verticaldirection to the surface of the TFT substrate 21. Therefore, the displaydevice 1 with a touch detection function according to the thirdmodification of the second embodiment does not cause a variation of adecrease of transmittance between pixels Pix. Accordingly, the slit SLaccording to the third modification of the second embodiment canstrengthen the invisibilizing effect, and even if the slit pitch LX isincreased, visibility of the detection electrode patterns 61 and thedummy patterns 63 and 64 can be reduced.

Furthermore, the display device 1 with a touch detection functionaccording to the third modification of the second embodiment can reducethe influence of the slit SL, as compared with the case where the slitSL is provided for each sub-pixel SPix. As a result, in the displaydevice 1 with a touch detection function according to the thirdmodification of the second embodiment, the possibility of causing adifference in the optical wavelengths due to the presence or nonpresenceof the transparent conductive body e can be suppressed. Therefore, thedisplay device 1 with a touch detection function according to the thirdmodification of the second embodiment can suppress the possibility ofshifting the color to be displayed originally by the liquid-crystaldisplay unit 20. As a result, the display unit 10 with a touch detectionfunction according to the third modification of the second embodimentcan decrease the possibility in which Moire fringes become visibleaccording to the visual field angle.

1-2E. Fourth Modification of Second Embodiment

FIG. 24 is a schematic diagram for explaining a fourth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 .Although not illustrated in FIG. 24 , the slit pitch LX according to thefourth modification of the second embodiment is multiples of a naturalnumber (for example, three times) of the pixel pitch GL, as in thesecond embodiment described above. The slit SL according to the fourthmodification of the second embodiment is a zigzag line. The slit SLaccording to the fourth modification of the second embodiment overlaps aplurality of color regions so as to extend across the plurality of colorregions as viewed in the vertical direction to the surface of the TFTsubstrate 21.

The slit folding pitch DL is equal to or smaller than six times thepitch SPL of the sub-pixel SPix in the extending direction of thescanning signal line GCL. The slit SL is folded back across sixsub-pixels SPix.

For example, as illustrated in FIG. 24 , the slit SL overlaps aplurality of color regions 32R, 32G, 32B, 32R, 32G, and 32B as viewed inthe vertical direction to the surface of the TFT substrate 21.Therefore, the display device 1 with a touch detection functionaccording to the fourth modification of the second embodiment does notcause a variation of a decrease of transmittance between pixels Pix.Accordingly, the slit SL according to the fourth modification of thesecond embodiment can strengthen the invisibilizing effect, and even ifthe slit pitch LX is increased, visibility of the detection electrodepatterns 61 and the dummy patterns 63 and 64 can be reduced.

Furthermore, the display device 1 with a touch detection functionaccording to the fourth modification of the second embodiment can reducethe influence of the slit SL, as compared with the case where the slitSL is provided for each sub-pixel SPix. As a result, in the displaydevice 1 with a touch detection function according to the fourthmodification of the second embodiment, the possibility of causing adifference in the optical wavelengths due to the presence or nonpresenceof the transparent conductive body e can be suppressed. Therefore, thedisplay device 1 with a touch detection function according to the fourthmodification of the second embodiment can suppress the possibility ofshifting the color to be displayed originally by the liquid-crystaldisplay unit 20. As a result, the display unit 10 with a touch detectionfunction according to the fourth modification of the second embodimentcan decrease the possibility in which Moire fringes become visibleaccording to the visual field angle.

1-2F. Fifth Modification of Second Embodiment

FIG. 25 is a schematic diagram for explaining a fifth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 .Although not illustrated in FIG. 25 , the slit pitch LX according to thefifth modification of the second embodiment is multiples of a naturalnumber (for example, three times) of the pixel pitch GL, as in thesecond embodiment described above. The slit SL according to the fifthmodification of the second embodiment is a zigzag line. The slit SLaccording to the fifth modification of the second embodiment overlapsthe position of the pixel signal line SGL illustrated in FIG. 10 , asviewed in the vertical direction to the surface of the TFT substrate 21.Therefore, light passing through the slit SL is dimmed by the scanningsignal line GCL. As a result, scattering light that may be generated atthe bent part SLQ of the slit SL is reduced. Accordingly, the slit SLaccording to the fifth modification of the second embodiment canstrengthen the invisibilizing effect, and even if the slit pitch LX isincreased, visibility of the detection electrode patterns 61 and thedummy patterns 63 and 64 can be reduced.

1-2G. Sixth Modification of Second Embodiment

FIG. 26 is a schematic diagram for explaining a sixth modification therelation between the arrangement of the touch detection electrodes andthe color regions of the color filter illustrated in FIG. 19 . The slitpitch LX according to the sixth modification of the second embodiment ismultiples of a natural number (for example, one time) of the pixelpitch. The slit SL according to the sixth modification of the secondembodiment is a zigzag line.

The bent part SLQ of the slit SL according to the sixth modification ofthe second embodiment overlaps the position of the scanning signal lineGCL illustrated in FIG. 10 , as viewed in the vertical direction to thesurface of the TFT substrate 21. Therefore, light passing through theslit SL is dimmed by the scanning signal line GCL. As a result,scattering light that may be generated at the bent part SLQ of the slitSL is reduced. Accordingly, the slit SL according to the sixthmodification of the second embodiment can strengthen the invisibilizingeffect, and even if the slit pitch LX is increased, visibility of thedetection electrode patterns 61 and the dummy patterns 63 and 64 can bereduced.

The bent part SLQ of the slit SL according to the sixth modification ofthe second embodiment overlaps entirely on the position of the scanningsignal line GCL illustrated in FIG. 10 , as viewed in the verticaldirection to the surface of the TFT substrate 21. The bent part SLQ ofthe slit SL can partly overlap the position of the scanning signal lineGCL as viewed in the vertical direction to the surface of the TFTsubstrate 21. In this case, the effect can be increased by the amount inwhich the bent part SLQ and the scanning signal line GCL overlap eachother.

1-2H. Seventh Modification of Second Embodiment

FIG. 27 is a schematic diagram for explaining a seventh modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 . Theslit pitch according to the seventh modification of the secondembodiment is multiples of a natural number (for example, one time) ofthe pixel pitch. The slit SL according to the seventh modification ofthe second embodiment is a zigzag line.

As illustrated in FIG. 27 , a light shielding layer BM, which has alight shielding function and is also referred to as “black matrix”, isarranged at the edge of the sub-pixel SPix in the same layer as thecolor filter 32. The bent part SLQ of the slit SL according to theseventh modification of the second embodiment overlaps the position ofthe light shielding layer BM as viewed in the vertical direction to thesurface of the TFT substrate 21. Therefore, light passing through theslit SL is dimmed by the light shielding layer BM. As a result,scattering light that may be generated at the bent part SLQ of the slitSL is reduced. Accordingly, the slit SL according to the seventhmodification of the second embodiment can strengthen the invisibilizingeffect, and even if the slit pitch LX is increased, visibility of thedetection electrode patterns 61 and the dummy patterns 63 and 64 can bereduced.

1-2I. Eighth Modification of Second Embodiment

FIG. 28 is a schematic diagram for explaining an eighth modification ofthe relation between the arrangement of the touch detection electrodesand the color regions of the color filter illustrated in FIG. 19 . Theslit pitch according to the eighth modification of the second embodimentis multiples of a natural number (for example, one time) of the pixelpitch. The slit SL according to the eighth modification of the secondembodiment is a zigzag line. The sub-pixels SPix illustrated in thesecond embodiment and the first to seventh modifications of the secondembodiment have a shape referred to as “dual domain pixel”. The shape ofthe sub-pixels SPix is not limited thereto, and can have a shapeillustrated in FIG. 28 , which is referred to as “pseudo dual domainpixel”.

1-2J. Ninth Modification of Second Embodiment

FIGS. 29 and 30 are schematic diagrams illustrating the arrangement ofthe touch detection electrodes according to a ninth modification of thesecond embodiment. As described above, the touch detection electrode TDLincludes the detection electrode patterns 61 and thedetection-electrodes conductive portions 62 that conduct between thedetection electrode patterns 61. The detection electrode patterns 61 andthe detection-electrodes conductive portions 62 surround the peripheryof the non-detection area 65. Although illustration of the slit SL isomitted in FIGS. 29 and 30 , because the slit SL is the zigzag line, theshape of a boundary line 66 on the side of the non-detection area 65 andthe shape of a boundary line 67 on the side of the dummy electrode TDDof the detection electrode pattern 61 also become zigzag.

The electrode pattern 61 illustrated in FIG. 29 is line-symmetric inwhich the boundary line 66 and the boundary line 67 of the electrodepattern 61 are folded back in the extending direction of the electrodepattern 61 (the direction orthogonal to the extending direction of thescanning signal line GCL described above). In the detection electrodepattern 61 illustrated in FIG. 30 , there is a part in which theboundary line 66 and the boundary line 67 of the electrode pattern 61are parallel to each other. Therefore, the width of the portion betweenthe boundary line 66 and the boundary line 67 in the directionorthogonal to the extending direction of the electrode pattern 61 (thedirection orthogonal to the extending direction of the scanning signalline GCL described above) becomes substantially constant. The detectionelectrode pattern 61 illustrated in FIG. 30 can reduce a partialelectric loss as compared with the detection electrode pattern 61illustrated in FIG. 29 , and can reduce a variation of a resistancecharacteristic within the surface of the touch detection device 30.

1-3. Third Embodiment

The display device 1 with a touch detection function according to athird embodiment is explained next. FIG. 31 is a schematic diagram forexplaining a change in luminance corresponding to an arrangement oftouch detection electrodes according to the third embodiment. FIGS. 32to 36 are schematic diagrams for explaining a relation between anarrangement of the touch detection electrodes and color regions of acolor filter according to the third embodiment. Same reference signsrefer to similar constituent elements explained in the first and secondembodiments, and redundant explanations thereof may not be repeated.

The color filter 32 includes color regions 32R, 32G, 32B, and 32Wcolored in four colors of red (R), green (G), blue (B), and white (W).The color filter 32 is matched with the pixel Pix as one set, in whichthe color regions 32R, 32G, 32B, and 32W colored in four colors of red(R), green (G), blue (B), and white (W) are matched with each sub-pixelSPix by cyclically arranging color filters colored in, for example, fourcolors of red (R), green (G), blue (B), and white (W).

A pattern (a) illustrated in FIG. 31 represents a state where the slitSL described in the first embodiment overlaps the color region 32B ofblue (B), of the color regions 32R, 32G, 32B, and 32W colored in fourcolors of red (R), green (G), blue (B), and white (W).

A pattern (b) illustrated in FIG. 31 represents a state where the slitSL described in the first embodiment overlaps the color region 32R ofred (R), of the color regions 32R, 32G, 32B, and 32W colored in fourcolors of red (R), green (G), blue (B), and white (W).

A pattern (c) illustrated in FIG. 31 represents a state where the slitSL described in the first embodiment overlaps the color region 32G ofgreen (G), of the color regions 32R, 32G, 32B, and 32W colored in fourcolors of red (R), green (G), blue (B), and white (W).

A pattern (d) illustrated in FIG. 31 represents a state where the slitSL described in the first embodiment overlaps the color region 32W ofwhite (W), of the color regions 32R, 32G, 32B, and 32W colored in fourcolors of red (R), green (G), blue (B), and white (W).

The patterns (a), (b), (d), and (d) illustrated in FIG. 31 can bearranged in order of from Blow having a low luminance to BHigh having ahigh luminance. Therefore, the color regions 32R and 32G illustrated inFIG. 32 are extended in the direction orthogonal to the extendingdirection of the scanning signal line GCL, and the color regions 32B and32W are arranged alternately every time the scanning signal line GCL isexceeded. The slit SL is a zigzag line that is folded back within apitch of two sub-pixels SPix in the extending direction of the scanningsignal line GCL, and is arranged at a slit pitch of multiples of anatural number (for example, one time) of the pixel pitch.

The color regions 32R and 32B illustrated in FIG. 33 are arrangedalternately every time the scanning signal line GCL is exceeded in thedirection orthogonal to the extending direction of the scanning signalline GCL. The color regions 32G and 32W are arranged alternately everytime the scanning signal line GCL is exceeded. The slit SL is a zigzagline that is folded back within a pitch of two sub-pixels SPix in theextending direction of the scanning signal line GCL, and is arranged ata slit pitch of multiples of a natural number (for example, two times)of the pixel pitch.

The color regions 32R, 32G, 32B, and 32W illustrated in FIG. 34 areextended in the direction orthogonal to the extending direction of thescanning signal line GCL. The slit SL is a zigzag line that is foldedback within a pitch of two sub-pixels SPix in the extending direction ofthe scanning signal line GCL, and is arranged at a slit pitch ofmultiples of a natural number (for example, one time) of the pixelpitch.

The color regions 32R and 32G illustrated in FIG. 35 are extended in thedirection orthogonal to the extending direction of the scanning signalline GCL, and the color regions 32B and 32W are arranged alternatelyevery time the scanning signal line GCL is exceeded. The slit SL is azigzag line that is folded back within a pitch of two sub-pixels SPix inthe extending direction of the scanning signal line GCL, and is arrangedat a slit pitch of multiples of a natural number (for example, one time)of the pixel pitch. The slit SL can avoid overlapping the white (W)color region 32W having the largest influence. With this arrangement,the possibility of weakening the invisibilizing effect because theluminance is high and the influence of the slit SL is increased as thepattern (d) illustrated in FIG. 31 can be reduced.

The color regions 32R and 32B illustrated in FIG. 36 are arrangedalternately every time the scanning signal line GCL is exceeded in thedirection orthogonal to the extending direction of the scanning signalline GCL, and the color regions 32G and 32W are arranged alternatelyevery time the scanning signal line GCL is exceeded. The slit SL is azigzag line that is folded back within a pitch of one sub-pixel SPix inthe extending direction of the scanning signal line GCL, and is arrangedat a slit pitch of multiples of a natural number (for example, one time)of the pixel pitch. The slit SL can avoid overlapping the white (W)color region 32W having the largest influence. With this arrangement,the possibility of weakening the invisibilizing effect because theluminance is high and the influence of the slit SL is increased as thepattern (d) illustrated in FIG. 31 can be reduced.

1-4. Modifications

While embodiments of the present disclosure have been explained above asdescribing several illustrative embodiments and modifications, thepresent disclosure is not limited to these embodiments and the like, andvarious modifications can be made.

In the embodiments described above, as described in the firstembodiment, the drive electrode COML is driven and scanned one by one.However, the present disclosure is not limited thereto, and instead ofthis example, for instance, a predetermined number of drive electrodesCOML can be driven and scanned by shifting the drive electrodes COML oneby one.

In the display device 1 with a touch detection function according to therespective embodiments and modifications described above, theliquid-crystal display unit 20 using liquid crystals of varioushorizontal electric-field modes such as FFS mode or IPS mode and thetouch detection device 30 can be integrated to form the display unit 10with a touch detection function. Alternatively, the display unit 10 witha touch detection function can be formed by integrating liquid crystalsof various vertical electric-field modes such as TN (Twisted Nematic)mode, VA (Vertical Alignment) mode, or ECB (Electrically ControlledBirefringence) mode and the touch detection device.

For example, the display device 1 with a touch detection function canuse a vertical electric-field mode liquid crystal. Furthermore, in therespective embodiments described above, a so-called “in-cell” type inwhich the liquid-crystal display unit 20 and the capacitive type touchdetection device 30 are integrated is used. However, the presentdisclosure is not limited thereto, and instead of this example, forinstance, the display device 1 with a touch detection function can be anapparatus in which the capacitive type touch detection device is mountedon the liquid-crystal display unit. Also in this case, by having theconfiguration described above, touch detection can be performed withMoire fringes reduced.

2. Application Example

Next, with reference to FIGS. 37 to 48 , application examples of thedisplay device 1 with a touch detection function explained in the aboveembodiments and modifications are explained. FIGS. 37 to 48 illustrateexamples of an electronic apparatus to which the display device with atouch detection function according to the above embodiments is applied.It is possible to apply the display device 1 with a touch detectionfunction according to the first, second, and third embodiments andmodifications to electronic apparatuses in any field, including atelevision device, a digital camera, a laptop personal computer, aportable terminal device such as a portable phone, a video camera, andthe like. In other words, it is possible to apply the display device 1with a touch detection function according to the first, second, andthird embodiments and modifications to electronic apparatuses in anyfield, which display a video signal input externally or a video signalgenerated internally as an image or a video.

Application Example 1

An electronic apparatus illustrated in FIG. 37 is a television device towhich the display device 1 with a touch detection function according tothe first, second, and third embodiments and modifications is applied.This television device includes a video display screen unit 510 thatincludes a front panel 511 and a filter glass 512, for example. Thevideo display screen unit 510 is the display device with a touchdetection function according to the first, second, and third embodimentsand modifications.

Application Example 2

An electronic apparatus illustrated in FIGS. 38 and 39 is a digitalcamera to which the display device 1 with a touch detection functionaccording to the first, second, and third embodiments and modificationsis applied. This digital camera includes a flash-light producing unit521, a display unit 522, a menu switch 523, and a shutter button 524,for example. The display unit 522 is the display device with a touchdetection function according to the first, second, and third embodimentsand modifications.

Application Example 3

An electronic apparatus illustrated in FIG. 40 is a video camera towhich the display device 1 with a touch detection function according tothe first, second, and third embodiments and modifications is applied,and FIG. 40 illustrates its external appearance. This video cameraincludes a main unit 531, a subject capturing lens 532 that is providedon the front side of the main unit 531, an image-capturing start/stopswitch 533, and a display unit 534, for example. The display unit 534 isthe display device with a touch detection function according to thefirst, second, and third embodiments and modifications.

Application Example 4

An electronic apparatus illustrated in FIG. 41 is a laptop personalcomputer to which the display device 1 with a touch detection functionaccording to the first, second, and third embodiments and modificationsis applied. This laptop personal computer includes a main unit 541, akeyboard 542 for an operation to input text and the like, and a displayunit 543 that displays an image. The display unit 543 is the displaydevice with a touch detection function according to the first, second,and third embodiments and modifications.

Application Example 5

An electronic apparatus illustrated in FIGS. 42 to 48 is a portablephone to which the display device 1 with a touch detection functionaccording to the first, second, and third embodiments and modificationsis applied. This portable phone is configured by coupling an uppercasing 551 and a lower casing 552 by a coupling unit (a hinge) 553, andincludes a display 554, a sub-display 555, a picture light 556, and acamera 557. The display 554 or the sub-display 555 is the display devicewith a touch detection function according to the first, second, andthird embodiments and modifications.

3. Aspects of the Present Disclosure

The present disclosure includes aspects as follows.

(1) A display device with a touch detection function comprising:

a substrate;

a plurality of pixel electrodes arranged in a matrix on a plane parallelto a surface of the substrate;

a plurality of scanning signal lines extending on a plane parallel tothe surface of the substrate to supply a scanning signal for driving thepixel electrodes;

a display functional layer that provides an image display function basedon an image signal;

a drive electrode that faces the pixel electrodes in a verticaldirection to the surface of the substrate and extends in a directionparallel to an extending direction of the scanning signal lines; and

a plurality of touch detection electrodes including a detectionelectrode pattern of a transparent conductive body that faces the driveelectrode in the vertical direction and extends in a direction differentfrom the extending direction of the scanning signal lines, wherein

the detection electrode pattern includes one or more slits each of whichis a region where the transparent conductive body is not present,

the slits of the detection electrode pattern of the touch detectionelectrodes extend in a direction different from the extending directionof the scanning signal lines with a slit pitch having a predeterminedinterval therebetween in the extending direction of the scanning signallines, and

the slit pitch is multiples of a natural number of a predetermined pixelpitch in which the pixel electrodes are arranged.

(2) The display device with a touch detection function according to (1),wherein

the touch detection electrode includes the detection electrode patternand a dummy pattern that does not function as an electrode,

the dummy pattern includes one or more slits each of which is a regionwhere the transparent conductive body is not present,

the slits of the dummy pattern of the touch detection electrodes extendin a direction different from the extending direction of the scanningsignal lines with a slit pitch having a predetermined interval in theextending direction of the scanning signal lines, and

the slit pitch of the detection electrode pattern and the slit pitch ofthe dummy pattern are same.

(3) The display device with a touch detection function according to (1),wherein the slits of the detection electrode pattern have a zigzag lineshape in which a straight line having an angle with respect to adirection orthogonal to the extending direction of the scanning signallines is folded back at a bent part.

(4) The display device with a touch detection function according to (1),wherein the slits of the detection electrode pattern have a wavy lineshape in which a straight line having an angle with respect to adirection orthogonal to the extending direction of the scanning signallines is folded back at a bent part.

(5) The display device with a touch detection function according to (3),wherein the slits of the detection electrode pattern has a shape inwhich the straight line having the angle with respect to the directionorthogonal to the extending direction of the scanning signal linesextends across one or more of the pixel electrodes, as viewed in thevertical direction.

(6) The display device with a touch detection function according to (3),further comprising a plurality of pixel signal lines that extend on aplane parallel to the surface of the substrate to supply a pixel signalfor displaying an image to the pixel electrodes, wherein

the bent part overlaps a part of the pixel signal line as viewed in thevertical direction.

(7) The display device with a touch detection function according to (3),further comprising a plurality of pixel signal lines that extend on aplane parallel to the surface of the substrate to supply a pixel signalfor displaying an image on the pixel electrodes, wherein

the slit of the detection electrode pattern extends along at least apart of the pixel signal line and overlaps therewith as viewed in thevertical direction.

(8) The display device with a touch detection function according to (3),wherein the bent part overlaps a part of the scanning signal line asviewed in the vertical direction.

(9) The display device with a touch detection function according to (1),further comprising a color filter that faces the display functionallayer in the vertical direction and has a plurality of color regionscolored in different colors, wherein

the slits are arranged so as to avoid a color region colored in white.

(10) The display device with a touch detection function according to(3), further comprising a light shielding layer that shields an edge ofthe pixel electrode from light, wherein

the slit overlaps a part of the light shielding layer as viewed in thevertical direction.

(11) The display device with a touch detection function according to(3), wherein the detection electrode pattern has a part in whichboundary lines on both sides thereof in the extending direction of thescanning signal lines are parallel to each other.

(12) An electronic apparatus comprising a display device with a touchdetection function that detects an external proximity object, thedisplay device with a touch detection function comprising:

a substrate;

a plurality of pixel electrodes arranged in a matrix on a plane parallelto a surface of the substrate;

a plurality of scanning signal lines extending on a plane parallel tothe surface of the substrate to supply a scanning signal for driving thepixel electrodes;

a display functional layer that provides an image display function basedon an image signal;

a drive electrode that faces the pixel electrodes in a verticaldirection to the surface of the substrate and extends in a directionparallel to an extending direction of the scanning signal lines; and

a plurality of touch detection electrodes including a detectionelectrode pattern of a transparent conductive body that faces the driveelectrode in the vertical direction and extends in a direction differentfrom the extending direction of the scanning signal lines, wherein

the detection electrode pattern includes one or more slits each of whichis a region where the transparent conductive body is not present,

the slits of the detection electrode pattern of the touch detectionelectrodes extend in a direction different from the extending directionof the scanning signal lines with a slit pitch having a predeterminedinterval therebetween in the extending direction of the scanning signallines, and

the slit pitch is multiples of a natural number of a predetermined pixelpitch in which the pixel electrodes are arranged.

The electronic apparatus according to the present disclosure includes adisplay device with a touch detection function. The electronic apparatusincludes, but are not limited to, to television sets, digital cameras,personal computer, video cameras, portable electronic apparatuses suchas mobile phones, etc.

In the display device with a touch detection function and the electronicapparatus according to the present disclosure, the possibility ofcausing a difference in optical wavelengths according to the presence ornonpresence of a transparent conductive body is suppressed. With thisconfiguration, the display device with a touch detection function cansuppress the possibility of shifting a color to be displayed originally.

According to one embodiment of the display device with a touch detectionfunction and the electronic apparatus according to the presentdisclosure, it is possible to decrease the possibility in which Moirefringes become visible according to the visual field angle.

It should be understood that various changes and modifications to thepresently preferred embodiments described herein will be apparent tothose skilled in the art. Such changes and modifications can be madewithout departing from the spirit and scope of the present subjectmatter and without diminishing its intended advantages. It is thereforeintended that such changes and modifications be covered by the appendedclaims.

The invention is claimed as follows:
 1. A display device with a touchdetection function comprising: a substrate; a plurality of pixelsarranged in a first direction and a second direction intersecting thefirst direction on the substrate; a plurality of scanning signal linesextending in the first direction to supply a scanning signal for drivingthe pixels; a plurality of pixel signal lines that extend on a planeparallel to a surface of the substrate to supply a pixel signal fordisplaying an image to the pixels; and a plurality of touch detectionelectrodes including a detection electrode pattern of a transparentconductive body that faces the substrate in the vertical direction,wherein the detection electrode pattern includes a plurality of slitseach of which is a region where the transparent conductive body is notpresent, each of the slits has a zigzag line shape in which a straightline having an angle with respect to the second direction is folded backat a bent part, each of the slits has at least three consecutive bentparts, the slits are disposed with a slit pitch having a constantinterval, and the slits, each having the zigzag line shape, are disposedparallel to each other such that the slits adjacent to each othermaintain the slit pitch in the first direction.
 2. The display devicewith a touch detection function according to claim 1, wherein the touchdetection electrode includes the detection electrode pattern and a dummypattern that does not function as an electrode, the dummy patternincludes a plurality of slits each of which is a region where thetransparent conductive body is not present, the slits of the dummypattern of the touch detection electrodes are disposed with a slit pitchhaving a constant interval, and the slit pitch of the detectionelectrode pattern and the slit pitch of the dummy pattern are same. 3.The display device with a touch detection function according to claim 1,wherein each of the slits having the zigzag line shape extends acrossthe pixels as viewed in the vertical direction.
 4. The display devicewith a touch detection function according to claim 1, wherein the bentpart overlaps a part of the pixel signal line as viewed in the verticaldirection.
 5. The display device with a touch detection functionaccording to claim 1, wherein the slit of the detection electrodepattern extends along at least a part of the pixel signal line andoverlaps therewith as viewed in the vertical direction.
 6. The displaydevice with a touch detection function according to claim 1, furthercomprising a light shielding layer that shields an edge of the pixelsfrom light, wherein the slit overlaps a part of the light shieldinglayer as viewed in the vertical direction.
 7. The display device with atouch detection function according to claim 1, wherein the detectionelectrode pattern has a part in which boundary lines on both sidesthereof are parallel to each other.
 8. The display device with a touchdetection function according to claim 1, wherein each of the touchdetection electrodes continuously extends to overlap at least four ofthe pixels in the second direction.
 9. The display device with a touchdetection function according to claim 1, a bent part pitch is a distancein the first direction between the bent parts of one of the slits, thebent parts being adjacent to each other in the second direction, and thebent part pitch is a same as a length of two of the pixels in the firstdirection.
 10. A display device with a touch detection functioncomprising: a substrate; a plurality of pixels arranged in a firstdirection and a second direction intersecting the first direction on thesubstrate; a plurality of scanning signal lines extending in the firstdirection to supply a scanning signal for driving the pixels; aplurality of pixel signal lines that extend on a plane parallel to asurface of the substrate to supply a pixel signal for displaying animage to the pixels; and a plurality of touch detection electrodesincluding a detection electrode pattern of a transparent conductive bodythat faces the substrate in the vertical direction, wherein thedetection electrode pattern includes a plurality of slits each of whichis a region where the transparent conductive body is not present, eachof the slits has a zigzag line shape in which a straight line having anangle with respect to the second direction is folded back at a bentpart, the slits are disposed with a slit pitch having a constantinterval, the bent parts of the slits are disposed with the slit pitchthat is constant, and the slits, each having the zigzag shape, aredisposed parallel to each other in the first direction crossing thepixel signal lines such that the slits closest to each other in thefirst direction are parallel to each other.
 11. The display device witha touch detection function according to claim 10, wherein each of thetouch detection electrodes continuously extends to overlap at least fourof the pixels in the second direction.
 12. The display device with atouch detection function according to claim 10, a bent part pitch is adistance in the first direction between the bent parts of one of theslits, the bent parts being adjacent to each other in the seconddirection, and the bent part pitch is a same as a length of two of thepixels in the first direction.